﻿<?xml version="1.0" encoding="utf-8"?>
<xs:schema
	xmlns:xs="http://www.w3.org/2001/XMLSchema"
	targetNamespace="A"
	xmlns:A="A">

  <xs:attribute name="a">
    <xs:simpleType>
      <xs:union memberTypes="xs:string" />
    </xs:simpleType>
  </xs:attribute>

</xs:schema>